Table 1.
Sample demographics, characteristics and adherence for daily diary and Fitbit data
| Variable | Total sample n = 2881 n(%) | No DD or Fitbit n = 643 (22.3%) % | DD and Fitbit n = 2238 (77.7%) % | Test statistic t(df) or χ2(df) |
|---|---|---|---|---|
|
| ||||
| Sex (% Female) | 1636 (56.8%) | 55.1% | 57.3% | χ2(1) = 1.01 |
| Race/Ethnicity | χ2(5) = 41.49*** | |||
| White | 1671 (58.0%) | 48.7% | 60.7% | |
| Black | 134 (4.7%) | 4.7% | 4.6% | |
| Hispanic/Latinx | 110 (3.8%) | 4.5% | 3.6% | |
| Asian | 654 (22.7%) | 30.1% | 20.4% | |
| Multi-racial | 243 (8.4%) | 7.9% | 8.6% | |
| Other | 69 (2.4%) | 3.6% | 2.1% | |
| Age (M(SD)) | 27.58 (2.6) | 27.61 (2.6) | 27.57 (2.5) | t(2865) = 0.33 |
| Pre PHQ-9 (M(SD)) | 2.66 (2.9) | 2.80 (3.1) | 2.61 (2.8) | t(2879) = 1.44 |
| Pre SI (% Yes) | 88 (3.1%) | 3.0% | 3.1% | χ2(1) = 0.01 |
| Q1 PHQ-9 (M(SD)) | 5.67 (4.2) | 6.08 (4.3) | 5.56 (4.1) | t(2839) = 2.70** |
| Q1 Dep (% Yes) | 500 (17.6%) | 18.7% | 17.3% | χ2(1) = 0.69 |
| Q1 SI (% Yes) | 217 (7.7%) | 6.1% | 8.1% | χ2(1) = 2.72 |
Note.
**
p <.01
***
p <.001. M(SD) = Mean(standard deviation). DD = Daily Diary. Pre = Pre-internship. PHQ-9 = Patient Health Questionnaire-9 score. Dep = PHQ-9 depression score >=10, indicating moderate-to-severe symptoms. Q1 = Quarter 1 follow-up assessment. SI = Suicidal Ideation.